Film magazine



Nov; 22, 1938. v A. J. ABRAMS 2,137,601

FILN MAGAZINE I Filed July 2, .1955 2 VINVENTOR M? a. ABRAMS A ORNEYPatented Na. 22, 1938 Arthur J. Abrams, New York, N. Y.

Application July 2, 1936, Serial No. 88,564

1 Claim.

This invention relates to improvements in film magazines adapted for usein motion picture cameras.

Heretofore, magazines of this type were provided with means in the formof reels or spools for winding or unwinding the film within themagazine,'and these means were arranged to be driven by the cameramechanism as the film is advanced past the exposure aperture of themagazine. In addition to the above means, a claw or sprocket or the likeis employed ifor advancing the film.

The above type of magazine is necessarily quite complicated andrelatively expensive, and

considerable skill is needed for introducing such a magazine into acamera.

The present invention therefore, seeks to provide an improved form ofmagazine, which is not only of simple and very inexpensive construction.but is also readily introduced into a camera even by unskilled persons.Hence it is an object of the invention to providea film magazine inwhich all spools and reels are emitted and in which a roll of film,provided with an initial "set" or curl, is placed in one filmcompartment' to be intermittently moved past the exposure aperture to aposition in another film compartment. The mentioned curl oi the dimcausessaid film to reform into a roli commenlarger diameter and withoutthe aid of any takeup mechanism. v

A further object is the provision of a film magazine adapted for thehousing of a film roll without the aid or spools'or reels, and one whichrequires no take-up mechanism-one which requires no coupling orconnection of any kindwith any moving part of the camera other than theassociation of the clawor equivalent film advancing means, with thesprocket holes of the film.

The invention also seeks to provide simple means for applying a drag tothe film as it is surate with its initial 'torm, but of somewhat beingmoved from one compartment to the other 7 Fig. 1 is a front edge view ofa film magazine as at present contemplated. 1

Fig. 2 is a side view thereof with the magazine cover removed.

Fig. 3 is a similar view of a modified form of magazine.

in saidmagazine.

The film magazine comprises a casing 5 formed with a back wall 6, topand bottom walls I, a front wall 8 and a rear wall 8. The cover itthereof also forms the front wall and is provided with a peripheralflange II for tight engagement with the front edges of the walls I, 8and '9.

in the present instance. the front wall a is provided with an exposureaperture i2 and with an elongated opening l3 so film advancing rz'ieans,such as a claw or the like, may engage the sprocket hoies h of the filmF in the magaaine. If desired, another hole Ito may be provided to beemployed for setting a sprocket hole 72 in proper relation to the filmadvancing means and thus making certain that said means would surelyengage the sprocket holes exposed by the opening l8.

The magazine is provided with an insert (Fig. 2i which may be of wood,Bakelite, or other suitable material. This insert shown at E4, is

Fig. 4 is a plan view of a film reel ernploy ed I provided at its upperend with a substantially circular opening it and at its lower end with asomewhat larger similar opening It. This opening forms filmcompartments, the compartment i5 serving to accommodate a film roll Rand the compartment I5 serving similarly for the exposed film whichforms the roll R Between the two compartments, the insert it is providedwith a central portion terminating in a wall El adjacent to the magazinewall 8 and spaced therefrom a distance somewhat greater than the filmthickness. The upper and lower portions oi the insert are arranged withWalt portions l8 designed to abut the wall 8 and to therefore insure thementioned spacing between. the walls 8 and II.

In. the above manner, the film may freely pass from the compartment iito the compartment I6, yet being maintained in a flat conditionespecially when passing by the exposure aperture l2. However, the speedat which the film is advanced, although intermittent, may causepromiscous unwinding of the film roll R. and thus destroy theregistration position of the sprocket holes h exposed by the opening M.It is, there- -.tore, desired to retard the movement of the film excqtwhen politivei'y moved by the film advancing means to preventoverrunning of the film. A simple manner of accomplishing this is toapply a drag on the film as by forming a kink or bendtherein such asshown at I! as the film passes through the throat of the compartment i5.Said throat is formed by an upper lip 2i set inwardly in relation to alower lip 22 on the insert it. This form of throat also serves to wipethe film clean of dust or other foreign matter which may be on saidfilm.

The throat 23 of the compartment (6. is arranged so the film may freelypass into said compartu out after passing the opening i8.

It will be noted that, as the film enters the compartment til, itimmediately starts to recurl and it is essential that it do otherwisethe film may form divers serp e loops which would fill the compartmentant resistance to oncoming film therelnto. son, the roll it is given aninitia e i enlist-am tially the following ma The film is suhstantiallyas J. or the like is Wound condition. The roll is then subjected to atemperature in excess of any temperatiu'e it may en.- counter inordinary usage. This will cause the emulsion, which is on one surface ofthe film, to soften and reset itself on, the film so that said film isgiven an inherent tendency to curl under normal handling and storingtemperatures. The roll is then rewound, with its outer couvolutionsinnermost so that the exaggerated curvature of the innermostconvolutions (now outermost) seek to maintain the roll in a close woundcondition at all times thereafter.

Now, when a roll is placed in th, compartment it of a magazine and itsouter convolutions are strung past the magazine apertures to pass intothe compartment 68, this end of the film will immediately seel: a,curled condition as shown.

Another'forni film magazine is shown in Figure 3 wherein, instead of thefixed insert it,

a freely hung plate 2! is designed to lightly press against the film F.This plate is provided with an angulated portion 28 at each end whichrides on an angled portion 21 formed on a bracket 28. It can be seenthat the plate 25 is dragged downwardly by its light frictionalengagement with the film and because of the angular engagement at 28 and2!, said plate is forced outwardly towards the front wall 8 of themagazine.

If desired, as shown, the plate 25 may be is obvious that skilledpersons may employ the principles here set forthin various ways. Henceinterpretation oi the invention as claimed should rather be based on theprior art than on the instant disclosure.

I claim:

A film magazine having in combination a cas lag having an aperturedwall, a bracket fixed wit n the casing, said bracket having extendingarms substantially parallel with the apertured wall of the casing, theend of one of said arms being angled in a direction away from saidapertured wall, the end of the other of said arms being angled in adirection toward said apertured wall, a member freely hung over saidbracket and arms, said member having angled portions corresponding tothe angled portions of the arms, passage space for a film strip betweenthe apertureo. wall and said member, said member and said arm endscooperating to urge the film strip into light frictional contact withthe apertured well during movement of said film in one direction.

ARTHUR J. ABRAMS.

